Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire;

FIG. 2 is a front view thereof;

FIG. 3 is a plane view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 8 is an end view taken along line 8-8 in FIG. 7;

FIG. 9 is an end view taken along line 9-9 in FIG. 7; and,

FIG. 10 is an end view taken along 10-10 in FIG. 7.

Broken lines in the drawings figures are used to show portions of the tire that are not being claimed and thus form no part of the claimed design. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 